Well Datahopa already looked good, but now it and other sites look brilliant.
I had noticed the problem with images when looking at my sister's holiday photos on Facebook. I thought they didn't look as good as expected. But I thought no more about it. Wasn't until I was scanning stamp images and doing screen shots of Jess that it came to my attention again so decided to look into it.
Glad I did, because now it's like I got an even better monitor

Definitely the best screen I have ever had by a mile.